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High-thermal-conductivity insulating spacer and preparation method thereof

An insulating gasket and high thermal conductivity technology, applied in the direction of insulators, insulators, inorganic insulators, etc., can solve the problems of poor thermal conductivity, poor insulation, and poor thermal conductivity of thermally conductive insulating gaskets

Active Publication Date: 2021-04-27
武汉肯达科讯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since both polyimide film and glass fiber are materials with poor thermal conductivity, the thermal conductivity and insulation gaskets produced have poor thermal conductivity, so the current research on silicone rubber gaskets still has the problems of low thermal conductivity and poor insulation.

Method used

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  • High-thermal-conductivity insulating spacer and preparation method thereof
  • High-thermal-conductivity insulating spacer and preparation method thereof
  • High-thermal-conductivity insulating spacer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: A high thermal conductivity insulating gasket, the high thermal conductivity insulating gasket is composed of insulators and functional fillers, and the functional fillers are carbon fibers coated with alumina, wherein the alumina is α-alumina, the carbon fibers are short carbon fibers, and the insulator is silica gel.

Embodiment 2

[0029] Embodiment 2: a kind of preparation method of high thermal conductivity insulating pad, it comprises the following steps:

[0030] S1. Preparation of dispersion liquid: Mix 10 g of short carbon fibers and 1 mL of dispersant with 100 mL of n-hexane, stir until uniformly dispersed, and maintain at 40° C. for 0.5 h; wherein, the dispersant is sorbitan fatty acid ester;

[0031] S2. Coated carbon fiber: 5g of aluminum sol aqueous solution with a solid content of 10wt% was mixed with the carbon fiber dispersion prepared in step S1 for reaction, and after 1 hour of reaction, it was dried at 60°C to constant weight to obtain the alumina-coated carbon fiber material ,Such as figure 1 As shown in the X-ray diffraction diagram, it can be seen that the cladding layer Al 2 o 3 It is α-type crystal, after coating, CF@Al 2 o 3 still contains the original crystal structure of CF; for CF@Al 2 o 3 The thermogravimetric analysis diagram obtained by performing thermogravimetric ana...

Embodiment 3

[0034] Embodiment 3: a kind of preparation method of high thermal conductivity insulating pad, it comprises the following steps:

[0035] S1. Preparation of dispersion: mix 20g of short carbon fibers and 3mL of dispersant with 200mL of petroleum ether, stir until uniformly dispersed, and maintain at 60°C for 1.5h; wherein, the dispersant is sorbitan fatty acid ester ;

[0036] S2. Coated carbon fiber: Mix 0.2 g of an aluminum sol aqueous solution with a solid content of 30 wt% and the carbon fiber dispersion prepared in step S1 for reaction, and then dry at 80°C to constant weight after 2 hours of reaction to obtain the alumina-coated carbon fiber materials such as figure 1 As shown in the X-ray diffraction diagram, it can be seen that the cladding layer Al 2 o 3 It is α-type crystal, after coating, CF@Al 2 o 3 still contains the original crystal structure of CF; for CF@Al 2 o 3 The thermogravimetric analysis diagram obtained by performing thermogravimetric analysis und...

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Abstract

The invention discloses a high-thermal-conductivity insulating spacer and a preparation method thereof. The high-thermal-conductivity insulating spacer is composed of an insulator and a functional filler, wherein the functional filler is alumina-coated carbon fiber; according to the high-thermal-conductivity insulating spacer, the aluminum oxide coated carbon fibers are used as the high-thermal-conductivity filler, so high thermal conductivity of the carbon fibers is maintained, and electrical conductivity of the carbon fibers is weakened; and then the prepared high-thermal-conductivity filler is orderly arranged in an insulator by utilizing a mechanical extrusion orientation technology, so a thermal-conductive gasket prepared on the basis of the alumina-coated carbon fiber has high thermal conductivity and high insulativity, and requirements of practical application are met.

Description

technical field [0001] The invention relates to the technical field of high thermal conductivity materials, in particular to a high thermal conductivity insulating gasket and a preparation method thereof. Background technique [0002] Conventional hard devices, electronic devices have a wide range of applications in fields such as wearable devices, energy storage, and implanted medicine. Similar to high thermal conductivity composite nanomaterials, the preparation of flexible electronic devices is mostly obtained by compounding conductive materials with flexible polymer matrix. However, during the repeated deformation of the device, the large contact resistance between the conductive materials and the poor contact between the conductive material and the polymer matrix will cause a large amount of heat to accumulate inside the electronic device. If the heat cannot be dissipated from the device in time, it will inevitably affect the performance and life of the device, and eve...

Claims

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Application Information

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IPC IPC(8): H01B17/56H01B3/10H01B19/00H05K7/20C09K5/14
CPCH01B17/56H01B3/10H01B19/00H05K7/2039C09K5/14
Inventor 毕曙光冉建华于洁谢佑南曹勇孙爱祥杨涛黄行智
Owner 武汉肯达科讯科技有限公司
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